在键值数组中，如何在foreach循环中增加数组值

Question

我有一个数组

        $rel = array('grandfather' => 0 ,
                    'grandmother' => 0 ,
                    'father' => 0 ,
                    'sister' => 0 ,
            );

我希望它与

中的数组$ family进行比较

    $data['family'] = $facebook->api('/me/family?fields=name,relationship,education,location,cover');

使用foreach循环

     foreach ($family as $families) {

            foreach ($families as $fams) {

                $id = $fams['id'];  
                $name = $fams['name'];

                $relationship = $fams['relationship'];

                foreach($rel as $k => $val){

                    if($k == $relationship)
                    {
                        $val += 1;
                    }
                }
            }
        }

我希望$val在每次迭代中递增，这样如果我有5个姐妹......我什么时候会

print_r($rel);

结果将是

Array ( [grandfather] => 0 [grandmother] => 0 [father] => 0 [sister] => 5 )

我已经尝试了上面的代码，但它仍然返回0 ..

Answer 1

试试这个

if($k == $relationship)
{
   $rel[$k] += 1;
}

Answer 2

它应该有用。

foreach（$ family as $ families）{

        foreach ($families as $fams) {

            $id = $fams['id'];  
            $name = $fams['name'];

            $relationship = $fams['relationship'];

            foreach($rel as $k => $val){

                if($k == $relationship)
                {
                    $rel[$relationship]++;
                }
            }
        }
    }